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Arima Group
- Coherent formation
- Late Cretaceous
- Lithofacies: Felsic-Neutral volcanic clasts
- Arima Group
- [ Upper ]
- ?--?--?--?--?-
- Akusa Formation
- ~~~~~~~~~~~~~~
- [ Lower ]
------ Conformity, ~~~~~~ Unconformity, ~~~--- Local unconformity, '''/,, Interfingered, :::::: Fault, /--/-- Thrust, +__+__ Ground surface, ?--?-- Unknown
- Distribution: Sasayama city, Hyogo pref.
- Hayashi et al. (2017) Jour. Geol. Soc. Japan, vol.123, no.9, pp.747-764 DOI
- Kobayashi and Goto (2008) Jour. Geol. Soc. Japan, vol.114, no.11, pp.577-586 DOI